From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Michal Hocko <mhocko@suse.com>
Cc: cve@kernel.org, linux-kernel@vger.kernel.org
Subject: Re: CVE-2023-52521: bpf: Annotate bpf_long_memcpy with data_race
Date: Tue, 5 Mar 2024 22:22:52 +0000 [thread overview]
Message-ID: <2024030539-semester-handcuff-27d0@gregkh> (raw)
In-Reply-To: <ZedOVc9h_VTBjHLD@tiehlicka>
On Tue, Mar 05, 2024 at 05:54:45PM +0100, Michal Hocko wrote:
> On Sat 02-03-24 22:53:05, Greg KH wrote:
> > Description
> > ===========
> >
> > In the Linux kernel, the following vulnerability has been resolved:
> >
> > bpf: Annotate bpf_long_memcpy with data_race
> >
> > syzbot reported a data race splat between two processes trying to
> > update the same BPF map value via syscall on different CPUs:
> >
> > BUG: KCSAN: data-race in bpf_percpu_array_update / bpf_percpu_array_update
>
> I would like to dispute this CVE. It adds data_race annotation which
> doesn't have any impact on the code generation.
Ah, my fault, I thought the "BUG: KCSAN:" line was a real BUG() call,
it's just a syslog dump, good catch.
I'll go revoke this now, thanks for the review!
greg k-h
prev parent reply other threads:[~2024-03-05 22:22 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <2024030253-CVE-2023-52521-d847@gregkh>
2024-03-05 16:54 ` CVE-2023-52521: bpf: Annotate bpf_long_memcpy with data_race Michal Hocko
2024-03-05 22:22 ` Greg Kroah-Hartman [this message]
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